I am writing an iphone application when you give a search text, it locate possible addresses.
I was thinking there maybe some Google API for this. I have seen several applications with this feature.
Can anyone provide some information on this?
If you've found the API you want (looks like you have), the basic idea is to use NSURLRequest, NSURLConnection, and NSMutableData to construct a url (ie. http://maps.googleapis.com/maps/api/geocode/output?parameters) and load the resulting data into your application.
From there, I would make use of a JSON parsing lib to convert the result string into an NSDictionary, so that you can use it easily in your app. This one is my favorite: http://code.google.com/p/json-framework/
good luck!